This cleans up the mmap() code path for GFS2 by implementing the
page_mkwrite function for GFS2. We are thus able to use the
generic filemap_fault function for our ->fault() implementation.

This now means that shared writable mappings will be much more
efficiently shared across the cluster if there is a reasonable
proportion of read activity (the greater proportion, the better).

As a side effect, it also reduces the size of the code, removes
special cases from readpage and readpages, and makes the code
path easier to follow.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

As requested by Christoph, this patch cleans up GFS2's internal
read function so that it no longer uses the do_generic_mapping_read
function. This function is obsolete and GFS2 is the last user of it.

As a side effect the internal read code gets smaller and easier
to read and gfs2_readpage is split into two. One function has the locking
and the other function has the rest of the logic.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>

Fix a race condition where multiple glock demote requests are sent to
a node back-to-back. This patch does a check inside handle_callback()
to see whether a demote request is in progress. If true, it sets a flag
to make sure run_queue() will loop again to handle the new request,
instead of erronously setting gl_demote_state to a different state.
Signed-off-by: NS. Wendy Cheng <wcheng@redhat.com>
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

Before transmission of the last word in PIO RX_ONLY mode rx+tx mode
is enabled:

	/* prevent last RX_ONLY read from triggering
	 * more word i/o: switch to rx+tx
	 */
	if (c == 0 && tx == NULL)
		mcspi_write_cs_reg(spi,
				OMAP2_MCSPI_CHCONF0, l);

But because c is decremented after the test, c will never be zero and
rx+tx will not be enabled. This breaks RX_ONLY mode PIO transfers.

Fix it by decrementing c in the beginning of the various I/O loops.
Signed-off-by: NKalle Valo <kalle.valo@nokia.com>
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This reverts commit 81100eb8 for the
release, to avoid the unnecessary warning noise that is only really
relevant to wireless driver developers.

The warning will probably go right back in after I cut the release, but
at least we won't unnecessarily worry users.
Acked-by: NJohn W. Linville <linville@tuxdriver.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  [SPARC64]: Partially revert "Constify function pointer tables."

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  Revert "ACPI: Fan: Drop force_power_state acpi_device option"
  ACPI: EC: "DEBUG" needs to be defined earlier
  ACPI: EC: add leading zeros to debug messages
  ACPI: EC: fix dmesg spam regression
  ACPI: DMI blacklist to reduce console warnings on OSI(Linux) systems.
  ACPI: Add ThinkPad R61, ThinkPad T61 to OSI(Linux) white-list
  ACPI: make _OSI(Linux) console messages smarter
  ACPI: Delete Intel Customer Reference Board (CRB) from OSI(Linux) DMI list
  ACPI: on OSI(Linux), print needed DMI rather than requesting dmidecode output
  ACPI: create acpi_dmi_dump()
  DMI: create dmi_get_slot()
  DMI: move dmi_available declaration to linux/dmi.h
  ACPI: processor: Fix null pointer dereference in throttling

Partial revert the changes made by 04231b30
to the kmem_list3 management. On a machine with a memoryless node, this
BUG_ON was triggering

	static void *____cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid)
	{
		struct list_head *entry;
		struct slab *slabp;
		struct kmem_list3 *l3;
		void *obj;
		int x;

		l3 = cachep->nodelists[nodeid];
		BUG_ON(!l3);
Signed-off-by: NMel Gorman <mel@csn.ul.ie>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Acked-by: NChristoph Lameter <clameter@sgi.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Nishanth Aravamudan <nacc@us.ibm.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The shared page table code for hugetlb memory on x86 and x86_64
is causing a leak.  When a user of hugepages exits using this code
the system leaks some of the hugepages.

-------------------------------------------------------
Part of /proc/meminfo just before database startup:
HugePages_Total:  5500
HugePages_Free:   5500
HugePages_Rsvd:      0
Hugepagesize:     2048 kB

Just before shutdown:
HugePages_Total:  5500
HugePages_Free:   4475
HugePages_Rsvd:      0
Hugepagesize:     2048 kB

After shutdown:
HugePages_Total:  5500
HugePages_Free:   4988
HugePages_Rsvd:
0 Hugepagesize:     2048 kB
----------------------------------------------------------

The problem occurs durring a fork, in copy_hugetlb_page_range().  It
locates the dst_pte using huge_pte_alloc().  Since huge_pte_alloc() calls
huge_pmd_share() it will share the pmd page if can, yet the main loop in
copy_hugetlb_page_range() does a get_page() on every hugepage.  This is a
violation of the shared hugepmd pagetable protocol and creates additional
referenced to the hugepages causing a leak when the unmap of the VMA
occurs.  We can skip the entire replication of the ptes when the hugepage
pagetables are shared.  The attached patch skips copying the ptes and the
get_page() calls if the hugetlbpage pagetable is shared.

[akpm@linux-foundation.org: coding-style cleanups]
Signed-off-by: NLarry Woodman <lwoodman@redhat.com>
Signed-off-by: NAdam Litke <agl@us.ibm.com>
Cc: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Ken Chen <kenchen@google.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: William Lee Irwin III <wli@holomorphy.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

: Stefan Roese <sr@denx.de> said:
> ppc: 4xx: sysctl table check failed: /kernel/l2cr .1.31 Missing strategy
>
> I'm seeing this error message when booting an recent arch/ppc kernel on
> 4xx platforms (tested on Ocotea and other 4xx platforms). Booting NFS
> rootfs still works fine, but this message kind of makes me "nervous".
> This is not seen on 4xx arch/powerpc platforms. Here the bootlog:

Because the data field was never filled and a binary sysctl handler was
never written this sysctl has never been usable through the sys_sysctl
interface.  So just remove the binary sysctl number.  Making the kernel
sanity checks happy.
Signed-off-by: NEric W. Biederman <ebiederm@xmission.com>
Reported-by: NStefan Roese <sr@denx.de>
Cc: Josh Boyer <jwboyer@gmail.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Michael Wu noticed in his lkml post at

    http://marc.info/?l=linux-kernel&m=119396182726091&w=2

that certain wireless drivers ended up having their name in module
memory, which would then crash the kernel on module unload.

The patch he proposed was a bit clumsy in that it increased the size of
a lockdep entry significantly; the patch below tries another approach,
it checks, on module teardown, if the name of a class is in module space
and then zaps the class.  This is very similar to what we already do
with keys that are in module space.
Signed-off-by: NArjan van de Ven <arjan@linux.intel.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Acked-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This partially reverts 872e2be7
(Constify function pointer tables.)

The solaris/socksys.c transformation wasn't valid:

arch/sparc64/solaris/socksys.c:192: error: assignment of read-only variable ‘socksys_file_ops’
arch/sparc64/solaris/socksys.c:195: error: assignment of read-only variable ‘socksys_file_ops’
arch/sparc64/solaris/socksys.c:196: error: assignment of read-only variable ‘socksys_file_ops’
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This reverts commit 93ad7c07.

http://bugzilla.kernel.org/show_bug.cgi?id=9798Signed-off-by: NLen Brown <len.brown@intel.com>

The "DEBUG" symbol needs to be defined before #including <linux/kernel.h> to
get the pr_debug() working.
Signed-off-by: NMárton Németh <nm127@freemail.hu>
Signed-off-by: NLen Brown <len.brown@intel.com>

Add leading zeros to pr_debug() calls. For example if x=0x0a, the format
"0x%2x" will result the string "0x a", the format "0x%2.2x" will result "0x0a".
Signed-off-by: NMárton Németh <nm127@freemail.hu>
Signed-off-by: NLen Brown <len.brown@intel.com>

Return OBF_1 optimization workaround

http://bugzilla.kernel.org/show_bug.cgi?id=8459Signed-off-by: NAlexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: NLen Brown <len.brown@intel.com>

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  [SPARC]: Constify function pointer tables.
  [SPARC64]: Fix section error in sparcspkr
  [SPARC64]: Fix of section mismatch warnings.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
  sis190: scheduling while atomic error
  sis190: mdio operation failure is not correctly detected
  sis190: remove duplicate INIT_WORK
  sis190: add cmos ram access code for the SiS19x/968 chipset pair
  [INET]: Fix truesize setting in ip_append_data
  [NETNS]: Re-export init_net via EXPORT_SYMBOL.
  iwlwifi: fix possible read attempt on ucode that is not available
  [IPV4]: Add missing skb->truesize increment in ip_append_page().
  [TULIP] DMFE: Fix SROM parsing regression.
  [BLUETOOTH]: Move children of connection device to NULL before connection down.

This DMI blacklist reduces the console messages
on systems which have a BIOS that invokes OSI(Linux).

As the DMI blacklist already knows about these systems,
the request for DMI info itself is disabled.

Further, if OSI(Linux) has already been determined
to have no beneift, we disable the console message
requesting acpi_osi=Linux test results.
Signed-off-by: NLen Brown <len.brown@intel.com>

acpi_osi=Linux helps sound on these systems.
Signed-off-by: NLen Brown <len.brown@intel.com>

If BIOS invokes _OSI(Linux), the kernel response
depends on what the ACPI DMI list knows about the system,
and that is reflectd in dmesg:

1) System unknown to DMI:

ACPI: BIOS _OSI(Linux) query ignored
ACPI: DMI System Vendor: LENOVO
ACPI: DMI Product Name: 7661W1P
ACPI: DMI Product Version: ThinkPad T61
ACPI: DMI Board Name: 7661W1P
ACPI: DMI BIOS Vendor: LENOVO
ACPI: DMI BIOS Date: 10/18/2007
ACPI: Please send DMI info above to linux-acpi@vger.kernel.org
ACPI: If "acpi_osi=Linux" works better, please notify linux-acpi@vger.kernel.org

2) System known to DMI, but effect of OSI(Linux) unknown:

ACPI: DMI detected: Lenovo ThinkPad T61
...
ACPI: BIOS _OSI(Linux) query ignored via DMI
ACPI: If "acpi_osi=Linux" works better, please notify linux-acpi@vger.kernel.org

3) System known to DMI, which disables _OSI(Linux):

ACPI: DMI detected: Lenovo ThinkPad T61
...
ACPI: BIOS _OSI(Linux) query ignored via DMI

4) System known to DMI, which enable _OSI(Linux):

ACPI: DMI detected: Lenovo ThinkPad T61
ACPI: Added _OSI(Linux)
...
ACPI: BIOS _OSI(Linux) query honored via DMI

cmdline overrides take precidence over the built-in
default and the DMI prescribed default.
cmdline "acpi_osi=Linux" results in:

ACPI: BIOS _OSI(Linux) query honored via cmdline
Signed-off-by: NLen Brown <len.brown@intel.com>

Linux does not want BIOS writers to invoke _OSI(Linux) -
for in the field it causes more Windows incompatibility problems
than it solves.

So when it is seen in the BIOS for an Intel Customer Reference Board,
Linux should ignore its effect by default, and should complain loudly.
Otherwise, the reference BIOS will go unfixed, and the bad BIOS
will spread to the field.

Users of this board can get the old behavior with "acpi_osi=Linux"

As this was the only entry, delete acpi_osl_dmi_table[].
Signed-off-by: NLen Brown <len.brown@intel.com>

Signed-off-by: NLen Brown <len.brown@intel.com>

A utility routine to print common entries used
for ACPI-related DMI blacklist entries.
Signed-off-by: NLen Brown <len.brown@intel.com>

This simply allows other sub-systems (such as ACPI)
to access and print out slots in static dmi_ident[].
Signed-off-by: NLen Brown <len.brown@intel.com>

Signed-off-by: NLen Brown <len.brown@intel.com>

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6:
  [SCSI] initio: fix module hangs on loading

E7221 chipset is a server version of the i915.
Signed-off-by: NDave Airlie <airlied@linux.ie>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The E7221 chipset is a 915 rebadged for the Intel server line.
Signed-off-by: NDave Airlie <airlied@linux.ie>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

There have been several reports of Xen guest domains locking up when
using vcpu_info structure placement.  Disable it for now.
Signed-off-by: NJeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

I've verified (on my Initio 9100 with a DAT drive) that the
2.6.24-rc8-git6 initio module still hangs on loading.

These fixes (other than the printk) are needed to get the module to load
ok (and work correctly) with my adapter & tape drive.

a) printk cosmetic fix

b) cblk->sglen needs setting for later DMA I/O routines to use

c) host->bios_addr needs setting for debug output correctness

d) semaph & semaph_lock initialisation had got lost since 2.6.22

e) since 2.6.22 the bios data address was truncated to 16 bits (needs 20
when shifted left)
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

Update ctime and mtime for memory-mapped files at a write access on
a present, read-only PTE, as well as at a write on a non-present PTE.
Signed-off-by: NAnton Salikhmetov <salikhmetov@gmail.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

sis190_tx_timeout
-> sis190_hw_start
   -> sis190_soft_reset
      -> msleep *splat*

PCI transactions are correctly flushed here.
The msleep() is probably useless.
Signed-off-by: NFrancois Romieu <romieu@fr.zoreil.com>
Cc: K.M. Liu <kmliu@sis.com.tw>

i ranges from 0 to 100 in the 'for' loop a few lines above.

Reported by davem.
Signed-off-by: NFrancois Romieu <romieu@fr.zoreil.com>
Cc: K.M. Liu <kmliu@sis.com.tw>

It is already done in sis190_init_one.
Signed-off-by: NFrancois Romieu <romieu@fr.zoreil.com>
Cc: K.M. Liu <kmliu@sis.com.tw>